Is - 20x+27 equal to 18x - (-3x+9)

echelon method and let z be the parameter 3x+y-z=0, 2x-y+3z=-7

Find the sum. Write your answer in the simplest form. 2 1/2 + 5 5/8 A 7 7/8 B 7 6/10 C 7 3/5 D 8 1/8

Parts of an algebraic expression separated by plus (+) or minus (-) signs are

The quotient of the sun of 6 and a number x, and 4

Mr. Harris gave each of his two children and equal amount of his baseball card collection. he gave Tony an album with cars on 15 pages and a stack up 25 cars that still needed to be put in the album.

A pattern has 1,000 identical circles. If 665 of the circles are orange, what decimal represents the part of the pattern that is orange? Why? A. 665 B. 66.5 C. 6.65 D. 0.665

Perpendicular lines form angles

The cost of manufacturing A certain type of headphone varies inversely as the number of headphones increase. If 5000 headphones can be manufactured for $15.00 each find the cost to manufacture 7,500 headphones

Twice jacks age plus five is 21. Write and solve an equation. How old is jack

How can you make sure your solution is correct in a quadratic formula